300km/h, those are the semi-high speed ones I guess, with several stops..

I guess demand for those have shrinked since faster options became available (ie, when the fast ones are sold out, they'll also be booked during high times, but lower fares compared to the high-speed ones during slower booking periods should ensure that some people will pick them instead, I guess?)

Also, it's not clear to me if they will simply decide if day X / hour X / train X is "high season" or "low season", or if they'll indeed do dynamic pricing depending on how well it's selling. I guess with the sheer amount of trains, they'll opt for a system as simple as possible, ie by days..